Firefox for iOS finally ships a native ad blocker, but not for search ads or its own sponsored tiles

Firefox for iOS finally ships a native ad blocker, but not for search ads or its own sponsored tiles

Firefox for iOS now ships a native ad blocker, and the detail users stress-tested first is what the blocker refuses to touch: ads on search engine results pages, and sponsored content on Firefox's own home screen. Both exemptions come from the support page Mozilla introduced on Saturday 1, quoted nearly word for word across a front-page Hacker News thread and AppleInsider's rollout coverage 2 3.

The money context tells you why the exemptions exist. AppleInsider reports that Mozilla said in 2025 that 90 percent of its revenue came from Firefox, and that roughly 85 percent of that stemmed from its Google search deal. Multiply the two and about 77 cents of every Mozilla dollar rides on the Google deal, while the new blocker leaves the ads on Google, Bing and DuckDuckGo results pages standing 3. Mozilla's audited 2022 statements, as reported by gHacks, put the concentration even higher: $510 million of $593 million in revenue, 86 percent, came from royalties, the majority of it from the Google search deal 4.

Firefox for iOS was the holdout among privacy-leaning iPhone browsers. Safari users have blocked ads with extensions for years, Brave has "been doing this for years" in one commenter's words, and Orion runs real extensions on iOS 2. The timing explains the attention: the thread keeps returning to Google sidelining uBlock Origin in Chrome as the reason a native blocker matters now, and some expect it to win Firefox some share back 2.

What the blocker blocks, and the two surfaces it spares

The excerpts of Mozilla's page circulating in the thread and in AppleInsider's report draw a clean line 2 3.

Blocked, per AppleInsider's summary of Mozilla's page: - Third-party advertising networks and exchanges, ad-related trackers, and many third-party ads served by websites - Intrusive formats such as pop-ups and overlays - Filtering runs at the network level, from a filter list based on EasyList, and stops ads before they load

Exempt, in the support page's own words: - "Ads shown on search engine results pages, including Google, Bing, DuckDuckGo and other search providers" - "Sponsored content on the Firefox Home or New Tab page"

One reply in the thread compressed both lists into a single sentence: "So block ads unless it impacts their revenue sources." 2 AppleInsider's read runs the same direction: skipping sponsored home-screen content "makes sense," it writes, because it is "a source of revenue for the organization," and the Google deal gives Firefox "an incentive" not to hurt its biggest payer 3.

Mozilla's own developer wiki for the iOS app fills in what the second exemption protects. Sponsored tiles sit under Top Sites on the homepage, are shown to users by default, are capped at two, and are fetched from a Mozilla ad-delivery endpoint at ads.mozilla.org as the app moves from the legacy Contile API to what the wiki calls a Unified Ads API. You can switch the tiles off under "Sponsored Shortcuts" in settings 5.

One mechanics question stayed open. AppleInsider reports network-level blocking, but the thread still asks whether that means DNS-style list blocking only, without cosmetic filtering, and why Mozilla did not build on Apple's Content Blocker API, which would let users bring their own filter lists and providers. The support-page excerpts circulating in the thread, and AppleInsider's report, answer neither question, so treat the mechanism as partially documented 2 3.

Firefox's side project has shipped iOS content blocking since 2015

Mozilla has been in the iOS content-blocking business since December 2015, when it launched Focus by Firefox, "a free content blocker for Safari users on iOS 9" 6. That app was developed into the minimalist Firefox Focus browser in 2016 and kept its background blocking, and Firefox Focus can still be set as a content blocker for Safari 7. The market this feature chases had already solved ad blocking on iOS with Safari extensions like uBlock Origin Lite and paid combos like Wipr 2 plus Filtr, both recommended in the thread 2. Firefox for iOS is not arriving first. It is arriving late, with two asterisks attached.

Should a Safari user switch?

• You gain: network-level, EasyList-based ad and tracker filtering built into the browser, no extension to install, switched on from the Site menu 3
• You still see: every ad on Google, Bing and DuckDuckGo results pages, plus up to two sponsored tiles unless you turn off Sponsored Shortcuts 2 5
• Undocumented so far: cosmetic filtering, and any use of Apple's Content Blocker API 2 3

For Safari users already running uBlock Origin Lite or Wipr, the case for switching now rests mostly on preferring Firefox itself.

THE VERDICT - Real progress: Firefox for iOS finally blocks ads natively, years after Brave, Orion and Mozilla's own Firefox Focus cleared the bar. - The exemptions read as a map of incentives: search results pages and Firefox's home screen are the two surfaces tied to Mozilla's revenue, and by the 2025 figures AppleInsider reports, about 77 percent of Mozilla's money rides on the Google search deal (86 percent on search royalties overall in the audited 2022 numbers). - Until the mechanism is documented, Safari users on a good extension lose little by waiting; the watch-item is whether Firefox for iOS ever adopts Apple's Content Blocker API so users can choose their own filter lists.